Apache HTTP Server: buffer overflow in mod_proxy_ajp via ajp_msg_check_header()_CVE-2026-28780

{
    "lastseen": "",
    "description": "Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server.\nIf mod_proxy_ajp connects to a malicious AJP server this AJP server can send a malicious AJP message back to mod_proxy_ajp and cause it to write 4 attacker controlled bytes after the end of a heap based buffer.\n\nThis issue affects Apache HTTP Server: through 2.4.66.\n\nUsers are recommended to upgrade to version 2.4.67, which fixes the issue.",
    "published": "2026-05-05T21:29:41.527Z",
    "modified": "2026-05-06T15:50:18.682Z",
    "type": "cve",
    "title": "Apache HTTP Server: buffer overflow in mod_proxy_ajp via  ajp_msg_check_header()",
    "source": "apache",
    "references": "https://httpd.apache.org/security/vulnerabilities_24.html",
    "id": "CVE-2026-28780",
    "bulletinFamily": "",
    "cwe": [
        "CWE-122"
    ],
    "cvelist": null,
    "sourceData": "Apache Software Foundation Apache HTTP Server 0",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Apache HTTP Server",
    "version": "0",
    "vendor": "Apache Software Foundation",
    "ai_description": "Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server",
    "ai_severity": "Critical",
    "ai_vendor": "Apache Foundation",
    "ai_product": "Apache HTTP Server",
    "ai_version": "through 2.4.66",
    "ai_score": 9.8
}